A bitter winter storm that dumped at least 10 inches of snow on St. Louis on Saturday left five people dead in crashes on slick roadways in Kansas and Missouri as it spread eastward across the country, authorities said.

A woman and her 14-year-old stepdaughter died after their car slid into a semitrailer in Clinton, about 80 miles southeast of Kansas City, Missouri State Highway Patrol said Friday.

Another woman died when her car slid in northern Missouri and was hit by an oncoming SUV.

In Kansas, a 62-year-old man died after his pickup truck skidded into a concrete barrier, the patrol said. And another crash involved two semitrailers, killing a 41-year old driver from Mexico.

By Saturday night, the storm had shifted toward the Virginia and Washington, D.C., area, where 5 to 10 inches of snow was expected, according to the National Weather Service. The weather prediction center said that freezing rain was also be a concern in parts of the Mid-Atlantic.

"I am declaring a state of emergency in order to prepare and coordinate the Commonwealth's response to anticipated winter storm impacts, including snow and ice accumulations, transportation issues, and power outages," said Northam.

The state of emergency allows the state to "mobilize resources and to deploy people and equipment to assist in response and recovery efforts," according to a news release.

St. Louis, which caught the brunt of the storm so far, recorded 10.1 inches, forcing the closure of sections of Interstates 44, 64 and 70 around the city. More than 11,000 customers were without power in Missouri as the heavy snow snapped branches and downed power lines.

Parts of central Missouri, around Harrisburg, reported up to 17 inches of snow.

Columbia, Missouri, was buried under 13 inches of snow, more than doubling a 109-year-old record for snowfall with more expected Saturday.

Layers of ice coat a bench at Lions Park as the sun peeks through clouds on Jan. 11, 2019, along the shores of Lake Michigan in St. Joseph, Michigan.(Photo: Don Campbell, AP)

Travelers along the Interstate 64 and 70 corridors of the Plains and Midwest can expect treacherous driving conditions.

The National Weather Service forecasts snow and ice overmuch of the East as a winter storm moves toward the mid-Atlantic.(Photo: NOAA)

The winter storm, which was expected to stretch 1,500 miles before it moves out to sea, was anchored in Denver, which saw up to 5 inches of snow in some areas. Antero Junction, Colorado, southwest of the city, recorded 14 inches. Parts of northern New Mexico were also hit by heavy snows, with 12 inches recorded near Talpa, New Mexico.

If you’re trying to decide if you should drive in this mess or stay home,

Michael Fuehne, left, and David Fellner Jr., both of Belleville, strain as they push the car of Billy Brownlee out of a pile of snow after Brownlee went sideways while making a turn in Belleville, Ill., on Saturday, Jan. 12, 2019. Multiple deaths on snow-slicked roads were reported in the Midwest as a winter storm swept the region this weekend, snarling traffic in several states and leaving thousands without power. Tim Vizer, St. Louis Post-Dispatch via AP

Jeff Clifford digs out his girlfriend's car from a pile of snow on Saturday, Jan. 12, 2019, in St. Louis. A winter storm swept the region this weekend, snarling traffic in several states and leaving thousands without power. Laurie Skrivan, St. Louis Post-Dispatch via AP

Becca Ryan, 7, of Columbia Tusculum, laughs after turning up hill to take another sled ride at Ault Park in the Hyde Park neighborhood of Cincinnati on Saturday, Jan. 12, 2019. A winter storm warning remained in effect until 7 A.M. Sunday after the region experienced the first snowfall of 2019. Sam Greene, Cincinnati Enquirer-USA TODAY NETWORK

Two children play in the snow before the procession for Colerain Township Police Officer Dale Woods passes through North College Hill along Galbraith Road, Saturday, Jan. 12, 2019, in North College Hill, Ohio. Woods, 46, who died Monday after being hit by a pickup truck Jan. 4 while working at the scene of a crash. Kareem Elgazzar, The Enquirer via USA TODAY Network

A man shovels as snow continues to fall in Colerain Township, a suburb Cincinnati Saturday Jan. 12, 2019. The National Weather Service cautioned that the accumulation will lead to hazardous travel in the area, recommending travelers stay home if possible until Sunday. Cara Owsley, The Enquirer via USA TODAY Network

Keith Morris, of the City of Owensboro's Street Department, takes off a hose after loading 1,000 gallons of salt brine into a tank on a truck, Friday afternoon, Jan. 11, 2019, so it can be spread on city roads in Owensboro, Ky. The National Weather Service had issued a winter weather advisory on Friday of accumulating snow moving into the area Friday evening into early Saturday. Alan Warren, The Messenger-Inquirer via AP

Significant icing was expected for the southern Appalachians and adjacent Piedmont region of North Carolina and southwest.

More than 1,040 flights were canceled nationwide and 10,485 were delayed as of 8 p.m. Saturday, according to flight-tracking service FlightAware.com. The hardest hit airport was St. Louis, where 119 combined arrivals and departures were canceled.

Southwest Airlines Co., Delta Air Lines Inc., United Continental Holdings Inc. and Frontier Airlines have all have waived rebooking fees for some airports because of the storm.